nslu2_pci.c revision 1.1.2.2
1 /* $NetBSD: nslu2_pci.c,v 1.1.2.2 2006/03/01 09:27:46 yamt Exp $ */ 2 3 /*- 4 * Copyright (c) 2006 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Steve C. Woodford. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 /* 39 * Copyright (c) 2003 40 * Ichiro FUKUHARA <ichiro (at) ichiro.org>. 41 * All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed by Ichiro FUKUHARA. 54 * 4. The name of the company nor the name of the author may be used to 55 * endorse or promote products derived from this software without specific 56 * prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR 59 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 60 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 61 * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR 62 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 */ 70 71 #include <sys/cdefs.h> 72 __KERNEL_RCSID(0, "$NetBSD: nslu2_pci.c,v 1.1.2.2 2006/03/01 09:27:46 yamt Exp $"); 73 74 /* 75 * Linksys NSLU2 PCI support. 76 */ 77 78 #include <sys/param.h> 79 #include <sys/systm.h> 80 #include <sys/device.h> 81 82 #include <arm/xscale/ixp425reg.h> 83 #include <arm/xscale/ixp425var.h> 84 85 #include <dev/pci/pcivar.h> 86 87 #include <evbarm/nslu2/nslu2reg.h> 88 89 static int 90 nslu2_pci_intr_map(struct pci_attach_args *pa, pci_intr_handle_t *ihp) 91 { 92 93 KASSERT(pa->pa_bus == 0 && pa->pa_device == 1); 94 95 switch (pa->pa_function) { 96 case 0: 97 *ihp = PCI_INT_A; 98 break; 99 100 case 1: 101 *ihp = PCI_INT_B; 102 break; 103 104 case 2: 105 *ihp = PCI_INT_C; 106 break; 107 108 default: 109 return (1); 110 } 111 112 return (0); 113 } 114 115 static const char * 116 nslu2_pci_intr_string(void *v, pci_intr_handle_t ih) 117 { 118 119 switch (ih) { 120 case PCI_INT_A: 121 return ("INTA"); 122 123 case PCI_INT_B: 124 return ("INTB"); 125 126 case PCI_INT_C: 127 return ("INTC"); 128 } 129 130 return (NULL); 131 } 132 133 static const struct evcnt * 134 nslu2_pci_intr_evcnt(void *v, pci_intr_handle_t ih) 135 { 136 137 return (NULL); 138 } 139 140 static void * 141 nslu2_pci_intr_establish(void *v, pci_intr_handle_t ih, int ipl, 142 int (*func)(void *), void *arg) 143 { 144 145 return (ixp425_intr_establish(ih, ipl, func, arg)); 146 } 147 148 static void 149 nslu2_pci_intr_disestablish(void *v, void *cookie) 150 { 151 152 ixp425_intr_disestablish(cookie); 153 } 154 155 void 156 ixp425_md_pci_conf_interrupt(pci_chipset_tag_t pc, int bus, int dev, int pin, 157 int swiz, int *ilinep) 158 { 159 160 KASSERT(bus == 0 && dev == 1); 161 162 *ilinep = ((swiz + pin - 1) & 3); 163 } 164 165 void 166 ixp425_md_pci_init(struct ixp425_softc *sc) 167 { 168 pci_chipset_tag_t pc = &sc->ia_pci_chipset; 169 u_int32_t reg; 170 171 pc->pc_intr_v = sc; 172 pc->pc_intr_map = nslu2_pci_intr_map; 173 pc->pc_intr_string = nslu2_pci_intr_string; 174 pc->pc_intr_evcnt = nslu2_pci_intr_evcnt; 175 pc->pc_intr_establish = nslu2_pci_intr_establish; 176 pc->pc_intr_disestablish = nslu2_pci_intr_disestablish; 177 178 /* PCI Reset Assert */ 179 reg = GPIO_CONF_READ_4(sc, IXP425_GPIO_GPOUTR); 180 reg &= ~(1u << GPIO_PCI_RESET); 181 GPIO_CONF_WRITE_4(sc, IXP425_GPIO_GPOUTR, reg); 182 183 /* PCI Clock Disable */ 184 reg = GPIO_CONF_READ_4(sc, IXP425_GPIO_GPCLKR); 185 reg &= ~GPCLKR_MUX14; 186 GPIO_CONF_WRITE_4(sc, IXP425_GPIO_GPCLKR, reg); 187 188 /* 189 * Set GPIO Direction 190 * Output: PCI_CLK, PCI_RESET 191 * Input: PCI_INTA, PCI_INTB, PCI_INTC 192 */ 193 reg = GPIO_CONF_READ_4(sc, IXP425_GPIO_GPOER); 194 reg &= ~((1u << GPIO_PCI_CLK) | (1u << GPIO_PCI_RESET)); 195 reg |= (1u << GPIO_PCI_INTA) | (1u << GPIO_PCI_INTB) | 196 (1u << GPIO_PCI_INTC); 197 GPIO_CONF_WRITE_4(sc, IXP425_GPIO_GPOER, reg); 198 199 /* 200 * Set GPIO interrupt type 201 * PCI_INT_A, PCI_INTB, PCI_INT_C: Active Low 202 */ 203 reg = GPIO_CONF_READ_4(sc, GPIO_TYPE_REG(GPIO_PCI_INTA)); 204 reg &= ~GPIO_TYPE(GPIO_PCI_INTA, GPIO_TYPE_MASK); 205 reg |= GPIO_TYPE(GPIO_PCI_INTA, GPIO_TYPE_ACT_LOW); 206 GPIO_CONF_WRITE_4(sc, GPIO_TYPE_REG(GPIO_PCI_INTA), reg); 207 208 reg = GPIO_CONF_READ_4(sc, GPIO_TYPE_REG(GPIO_PCI_INTB)); 209 reg &= ~GPIO_TYPE(GPIO_PCI_INTB, GPIO_TYPE_MASK); 210 reg |= GPIO_TYPE(GPIO_PCI_INTB, GPIO_TYPE_ACT_LOW); 211 GPIO_CONF_WRITE_4(sc, GPIO_TYPE_REG(GPIO_PCI_INTB), reg); 212 213 reg = GPIO_CONF_READ_4(sc, GPIO_TYPE_REG(GPIO_PCI_INTC)); 214 reg &= ~GPIO_TYPE(GPIO_PCI_INTC, GPIO_TYPE_MASK); 215 reg |= GPIO_TYPE(GPIO_PCI_INTC, GPIO_TYPE_ACT_LOW); 216 GPIO_CONF_WRITE_4(sc, GPIO_TYPE_REG(GPIO_PCI_INTC), reg); 217 218 /* Clear ISR */ 219 GPIO_CONF_WRITE_4(sc, IXP425_GPIO_GPISR, (1u << GPIO_PCI_INTA) | 220 (1u << GPIO_PCI_INTB) | (1u << GPIO_PCI_INTC)); 221 222 /* Wait 1ms to satisfy "minimum reset assertion time" of the PCI spec */ 223 DELAY(1000); 224 reg = GPIO_CONF_READ_4(sc, IXP425_GPIO_GPCLKR); 225 reg |= (0xf << GPCLKR_CLK0DC_SHIFT) | (0xf << GPCLKR_CLK0TC_SHIFT); 226 GPIO_CONF_WRITE_4(sc, IXP425_GPIO_GPCLKR, reg); 227 228 /* PCI Clock Enable */ 229 reg = GPIO_CONF_READ_4(sc, IXP425_GPIO_GPCLKR); 230 reg |= GPCLKR_MUX14; 231 GPIO_CONF_WRITE_4(sc, IXP425_GPIO_GPCLKR, reg); 232 233 /* 234 * Wait 100us to satisfy "minimum reset assertion time from clock stable 235 * requirement of the PCI spec 236 */ 237 DELAY(100); 238 /* PCI Reset deassert */ 239 reg = GPIO_CONF_READ_4(sc, IXP425_GPIO_GPOUTR); 240 reg |= 1u << GPIO_PCI_RESET; 241 GPIO_CONF_WRITE_4(sc, IXP425_GPIO_GPOUTR, reg); 242 243 /* 244 * AHB->PCI address translation 245 * PCI Memory Map allocation in 0x48000000 (64MB) 246 * see. IXP425_PCI_MEM_HWBASE 247 */ 248 PCI_CSR_WRITE_4(sc, PCI_PCIMEMBASE, 0x48494a4b); 249 250 /* 251 * PCI->AHB address translation 252 * begin at the physical memory start + OFFSET 253 */ 254 #define AHB_OFFSET 0x10000000UL 255 reg = (AHB_OFFSET + 0x00000000) >> 0; 256 reg |= (AHB_OFFSET + 0x01000000) >> 8; 257 reg |= (AHB_OFFSET + 0x02000000) >> 16; 258 reg |= (AHB_OFFSET + 0x03000000) >> 24; 259 PCI_CSR_WRITE_4(sc, PCI_AHBMEMBASE, reg); 260 261 /* Write Mapping registers PCI Configuration Registers */ 262 /* Base Address 0 - 3 */ 263 ixp425_pci_conf_reg_write(sc, PCI_MAPREG_BAR0, AHB_OFFSET + 0x00000000); 264 ixp425_pci_conf_reg_write(sc, PCI_MAPREG_BAR1, AHB_OFFSET + 0x01000000); 265 ixp425_pci_conf_reg_write(sc, PCI_MAPREG_BAR2, AHB_OFFSET + 0x02000000); 266 ixp425_pci_conf_reg_write(sc, PCI_MAPREG_BAR3, AHB_OFFSET + 0x03000000); 267 268 /* Base Address 4 */ 269 ixp425_pci_conf_reg_write(sc, PCI_MAPREG_BAR4, 0xffffffff); 270 271 /* Base Address 5 */ 272 ixp425_pci_conf_reg_write(sc, PCI_MAPREG_BAR5, 0x00000000); 273 274 /* Assert some PCI errors */ 275 PCI_CSR_WRITE_4(sc, PCI_ISR, ISR_AHBE | ISR_PPE | ISR_PFE | ISR_PSE); 276 277 /* 278 * Set up byte lane swapping between little-endian PCI 279 * and the big-endian AHB bus 280 */ 281 PCI_CSR_WRITE_4(sc, PCI_CSR, CSR_IC | CSR_ABE | CSR_PDS); 282 283 /* 284 * Enable bus mastering and I/O,memory access 285 */ 286 ixp425_pci_conf_reg_write(sc, PCI_COMMAND_STATUS_REG, 287 PCI_COMMAND_IO_ENABLE | PCI_COMMAND_MEM_ENABLE | 288 PCI_COMMAND_MASTER_ENABLE); 289 290 /* 291 * Wait some more to ensure PCI devices have stabilised. 292 */ 293 DELAY(50000); 294 } 295
Indexes created Thu Oct 16 14:10:15 GMT 2025